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Title: Gold-rich R3Au7Sn3: Establishing the interdependence between electronic features and physical properties

Abstract

Two new polar intermetallic compounds Y3Au7Sn3 (I) and Gd3Au7Sn3 (II) have been synthesized and their structures have been determined by single crystal X-ray diffraction (P63/m; Z = 2, a = 8.148(1)/8.185(3), and c = 9.394(2)/9.415(3) for I/II, respectively). They can formally be assigned to the Cu10Sn3 type and consist of parallel slabs of Sn centered, edge-sharing trigonal Au6 antiprisms connected through R3 (R = Y, Gd) triangles. Additional Au atoms reside in the centres of trigonal Au6 prisms forming Au@Au6 clusters with Au–Au distances of 2.906–2.960 Å, while the R–R contacts in the R3 groups are considerably larger than the sums of their metallic radii. These exclusive structural arrangements provide alluring systems to study the synergism between strongly correlated systems, particularly, those in the structure of (II), and extensive polar intermetallic contacts, which has been inspected by measurements of the magnetic properties, heat capacities and electrical conductivities of both compounds. Gd3Au7Sn3 shows an antiferromagnetic ordering at 13 K, while Y3Au7Sn3 is a Pauli paramagnet and a downward curvature in its electrical resistivity at about 1.9 K points to a superconducting transition. DFT-based band structure calculations on R3Au7Sn3 (R = Y, Gd) account for the results of the conductivity measurements andmore » different spin ordering models of (II) provide conclusive hints about its magnetic structure. As a result, chemical bonding analyses of both compounds indicate that the vast majority of bonding originates from the heteroatomic Au–Gd and Au–Sn interactions, while homoatomic Au–Au bonding is evident within the Au@Au6 clusters.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [1];  [2]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States); Univ. of Genova, Genova (Italy); Institute SPIN-CNR, Genova (Italy)
  2. Iowa State Univ., Ames, IA (United States); Ames Lab., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  4. Tata Institute of Fundamental Research, Mumbai (India)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240738
Report Number(s):
IS-J-8712
Journal ID: ISSN 2050-7526; JMCCCX
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry C
Additional Journal Information:
Journal Volume: 3; Journal Issue: 32; Journal ID: ISSN 2050-7526
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Provino, Alessia, Steinberg, Simon, Smetana, Volodymyr, Kulkarni, Ruta, Dhar, Sudesh K., Manfrinetti, Pietro, and Mudring, Anja -Verena. Gold-rich R3Au7Sn3: Establishing the interdependence between electronic features and physical properties. United States: N. p., 2015. Web. doi:10.1039/C5TC00884K.
Provino, Alessia, Steinberg, Simon, Smetana, Volodymyr, Kulkarni, Ruta, Dhar, Sudesh K., Manfrinetti, Pietro, & Mudring, Anja -Verena. Gold-rich R3Au7Sn3: Establishing the interdependence between electronic features and physical properties. United States. https://doi.org/10.1039/C5TC00884K
Provino, Alessia, Steinberg, Simon, Smetana, Volodymyr, Kulkarni, Ruta, Dhar, Sudesh K., Manfrinetti, Pietro, and Mudring, Anja -Verena. Mon . "Gold-rich R3Au7Sn3: Establishing the interdependence between electronic features and physical properties". United States. https://doi.org/10.1039/C5TC00884K. https://www.osti.gov/servlets/purl/1240738.
@article{osti_1240738,
title = {Gold-rich R3Au7Sn3: Establishing the interdependence between electronic features and physical properties},
author = {Provino, Alessia and Steinberg, Simon and Smetana, Volodymyr and Kulkarni, Ruta and Dhar, Sudesh K. and Manfrinetti, Pietro and Mudring, Anja -Verena},
abstractNote = {Two new polar intermetallic compounds Y3Au7Sn3 (I) and Gd3Au7Sn3 (II) have been synthesized and their structures have been determined by single crystal X-ray diffraction (P63/m; Z = 2, a = 8.148(1)/8.185(3), and c = 9.394(2)/9.415(3) for I/II, respectively). They can formally be assigned to the Cu10Sn3 type and consist of parallel slabs of Sn centered, edge-sharing trigonal Au6 antiprisms connected through R3 (R = Y, Gd) triangles. Additional Au atoms reside in the centres of trigonal Au6 prisms forming Au@Au6 clusters with Au–Au distances of 2.906–2.960 Å, while the R–R contacts in the R3 groups are considerably larger than the sums of their metallic radii. These exclusive structural arrangements provide alluring systems to study the synergism between strongly correlated systems, particularly, those in the structure of (II), and extensive polar intermetallic contacts, which has been inspected by measurements of the magnetic properties, heat capacities and electrical conductivities of both compounds. Gd3Au7Sn3 shows an antiferromagnetic ordering at 13 K, while Y3Au7Sn3 is a Pauli paramagnet and a downward curvature in its electrical resistivity at about 1.9 K points to a superconducting transition. DFT-based band structure calculations on R3Au7Sn3 (R = Y, Gd) account for the results of the conductivity measurements and different spin ordering models of (II) provide conclusive hints about its magnetic structure. As a result, chemical bonding analyses of both compounds indicate that the vast majority of bonding originates from the heteroatomic Au–Gd and Au–Sn interactions, while homoatomic Au–Au bonding is evident within the Au@Au6 clusters.},
doi = {10.1039/C5TC00884K},
journal = {Journal of Materials Chemistry C},
number = 32,
volume = 3,
place = {United States},
year = {Mon May 18 00:00:00 EDT 2015},
month = {Mon May 18 00:00:00 EDT 2015}
}

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Works referencing / citing this record:

Revealing Tendencies in the Electronic Structures of Polar Intermetallic Compounds
journal, February 2018


Revealing Tendencies in the Electronic Structures of Polar Intermetallic Compounds
text, January 2018